CN102263551A - Video signal frequency division circuit - Google Patents
Video signal frequency division circuit Download PDFInfo
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- CN102263551A CN102263551A CN2010101824000A CN201010182400A CN102263551A CN 102263551 A CN102263551 A CN 102263551A CN 2010101824000 A CN2010101824000 A CN 2010101824000A CN 201010182400 A CN201010182400 A CN 201010182400A CN 102263551 A CN102263551 A CN 102263551A
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Abstract
The invention is applied in the field of display, and provides a video signal frequency division circuit. The video signal frequency division circuit comprises a digital video signal input module, a first conversion module, a plurality of second conversion modules and a plurality of digital video signal output modules. In the embodiment of the invention, the first conversion module converts a digital video signal into a bus signal; the plurality of second conversion modules convert the bus signal output by the first conversion module into the digital video signal respectively; and the digital video signal is output to a plurality of pieces of display equipment by the plurality of digital video signal output modules. Therefore, the video signal frequency division circuit can perform frequency division on the digital video signal to satisfy the needs of a client.
Description
Technical field
The invention belongs to the demonstration field, relate in particular to a kind of vision signal frequency dividing circuit.
Background technology
Now, the vision signal frequency dividing circuit is widely used in our daily life, such as, in the household electrical appliances market, businessman is in order to show the properties of product of television set to client, the capital allows the television set display image of various models, and these television sets often use same vision signal, and this just needs the vision signal frequency dividing circuit to become a plurality of vision signals to supply with a plurality of television sets respectively a vision signal frequency division to show.
But, present vision signal frequency dividing circuit can only carry out frequency division to analog video signal, and can't carry out frequency division to digital video signal, and along with the extensive use of Digital Television, people press for a vision signal frequency dividing circuit that can carry out frequency division to digital video signal.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of vision signal frequency dividing circuit, is intended to solve present vision signal frequency dividing circuit and has the problem that can't carry out frequency division to digital video signal.
The embodiment of the invention is achieved in that a kind of vision signal frequency dividing circuit, and described vision signal frequency dividing circuit comprises:
The digital video signal input module that is connected with digital video signal source;
First modular converter, the output of the described digital video signal input module of its input termination is used for converting the digital video signal of described digital video signal input module output to bus signals;
A plurality of second modular converters, the output of described first modular converter of input termination of each described second modular converter is used for converting the bus signals of described first modular converter output to digital video signal; And
A plurality of digital video signal output modules, corresponding with described a plurality of second modular converters respectively, the output of input termination second modular converter of described digital video signal output module.
In embodiments of the present invention, first modular converter converts digital video signal to bus signals, a plurality of second modular converters convert the bus signals of first modular converter output to digital video signal respectively, export to a plurality of display devices respectively through a plurality of digital video signal output modules, like this, the vision signal frequency dividing circuit just can carry out frequency division to digital video signal, has satisfied client's demand.
Description of drawings
Fig. 1 is the structure chart of the vision signal frequency dividing circuit that provides of the embodiment of the invention;
Fig. 2 is the exemplary circuit figure of the vision signal frequency dividing circuit that provides of the embodiment of the invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
In embodiments of the present invention, first modular converter converts digital video signal to bus signals, a plurality of second modular converters convert the bus signals of first modular converter output to digital video signal respectively, export to a plurality of display devices respectively through a plurality of digital video signal output modules, like this, the vision signal frequency dividing circuit just can carry out frequency division to digital video signal, has satisfied client's demand.
Fig. 1 shows the structure of the vision signal frequency dividing circuit that the embodiment of the invention provides, and for convenience of explanation, only shows the part relevant with the embodiment of the invention.
The vision signal frequency dividing circuit comprises digital video signal input module 100, first modular converter 200, a plurality of second modular converter 300 and a plurality of digital video signal output module 400.
Digital video signal input module 100 is connected with digital video signal source;
The output of the input termination digital video signal input module 100 of first modular converter 200 is used for converting the digital video signal of digital video signal input module 100 outputs to bus signals;
A plurality of second modular converters 300, the output of input termination first modular converter 200 of each second modular converter 300 is used for converting the bus signals of first modular converter, 200 outputs to digital video signal;
A plurality of digital video signal output modules 400, corresponding with a plurality of second modular converters 300 respectively, the output of input termination second modular converter 300 of digital video signal output module 400.
As one embodiment of the invention, the tie point of the digital video signal input module 100 and first modular converter 200 also is connected to first and filters protection module 500, is used for the digital video signal of digital video signal input module 100 outputs is carried out electro static filtering.
As one embodiment of the invention, each second modular converter 300 also is connected to the second filtration protection module 600 with the tie point of digital video signal output module 400, is used for the digital video signal of second modular converter, 300 outputs is carried out electro static filtering.
Second modular converter 300, digital video signal output module 400 and second filter the quantity decision of the quantity of protection module 600 by display device, and several display devices are arranged, and the vision signal frequency dividing circuit just is divided into digital video signal several roads and gives display device respectively.
Fig. 2 shows the exemplary circuit structure of the vision signal frequency dividing circuit that the embodiment of the invention provides, and for convenience of explanation, only shows the part relevant with the embodiment of the invention.
As one embodiment of the invention, digital video signal source is the DVI digital video signal source, digital video signal input module 100 adopts DVI digital video signal interface CN1, and VT DAT0+, DAT0-, DAT1+, DAT1-, DAT2+, DAT2-, CLK+ and the CLK-of DVI digital video signal interface CN1 is as the output of digital video signal input module 100.
As one embodiment of the invention, first modular converter 200 adopts the first conversion chip U1, the model of the first conversion chip U1 is SII161, the video signal input terminal DAT0+ of the first conversion chip U1, DAT0-, DAT1+, DAT1-, DAT2+, DAT2-, CLK+ and CLK-be as the input of first modular converter 200, the bus signals output D0 of the first conversion chip U1, D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23, DE, V, H and CLK are as the output of first modular converter 200.
As one embodiment of the invention, second modular converter 300 adopts the second conversion chip U2, the model of the second conversion chip U2 is SSI164, the bus signals input D0 of the second conversion chip U2, D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23, DE, V, H and CLK be as the input of second modular converter 300, the VT DAT0+ of the second conversion chip U2, DAT0-, DAT1+, DAT1-, DAT2+, DAT2-, CLK+ and CLK-are as the output of second modular converter 300.
As one embodiment of the invention, digital video signal output module 400 adopts DVI digital video signal interface CN2, and video signal input terminal DAT0+, DAT0-, DAT1+, DAT1-, DAT2+, DAT2-, CLK+ and the CLK-of DVI digital video signal interface CN2 is as the input of digital video signal output module 400.
As one embodiment of the invention; first filters protection module 500 comprises diode D1; diode D2; diode D3; diode D4; diode D5; diode D6; diode D7; diode D8; diode D9; diode D10; diode D11; diode D12; diode D13; diode D14; diode D15 and diode D16; diode D1; diode D3; diode D5; the negative electrode of diode D7 meets the video signal input terminal DAT0+ of the first conversion chip U1 respectively; DAT0-; DAT1+; DAT1-; diode D2; diode D4; diode D6; the anode of diode D8 meets the video signal input terminal DAT0+ of the first conversion chip U1 respectively; DAT0-; DAT1+; DAT1-; diode D1; diode D3; diode D5; the plus earth of diode D7, diode D2; diode D4; diode D6; the negative electrode of diode D8 meets 5V power supply VCC.
The negative electrode of diode D10, diode D12, diode D14, diode D16 meets video signal input terminal CLK-, CLK+, DAT2-and the DAT2+ of the first conversion chip U1 respectively, the anode of diode D9, diode D11, diode D13, diode D15 meets video signal input terminal CLK-, CLK+, DAT2-and the DAT2+ of the first conversion chip U1 respectively, the plus earth of diode D10, diode D12, diode D14, diode D16, the negative electrode of diode D9, diode D11, diode D13, diode D15 meets 5V power supply VCC.
As one embodiment of the invention; second filters protection module 600 comprises diode D17; diode D18; diode D19; diode D20; diode D21; diode D22; diode D23; diode D24; diode D25; diode D26; diode D27; diode D28; diode D29; diode D30; diode D31 and diode D32; diode D25; diode D27; diode D29; the negative electrode of diode D31 meets the VT DAT0+ of the second conversion chip U2 respectively; DAT0-; DAT1+; DAT1-; diode D26; diode D28; diode D30; the anode of diode D32 meets the VT DAT0+ of the second conversion chip U2 respectively; DAT0-; DAT1+; DAT1-; diode D25; diode D27; diode D29; the plus earth of diode D31, diode D26; diode D28; diode D30; the negative electrode of diode D32 meets 5V power supply VCC.
The negative electrode of diode D18, diode D20, diode D22, diode D24 meets VT CLK-, CLK+, DAT2-and the DAT2+ of the second conversion chip U2 respectively, the anode of diode D17, diode D19, diode D21, diode D23 meets VT CLK-, CLK+, DAT2-and the DAT2+ of the second conversion chip U2 respectively, the plus earth of diode D18, diode D20, diode D22, diode D24, the negative electrode of diode D17, diode D19, diode D21, diode D23 meets 5V power supply VCC.
Be the DVI digital video signal source with the digital video signal source below, the operation principle of vision signal frequency dividing circuit be described:
The DVI digital video signal enters the vision signal frequency dividing circuit from DVI digital video signal interface CN1, through behind the electro static filtering, the DVI digital video signal enters the first conversion chip U1, the first conversion chip U1 converts the DVI digital video signal to bus signals, the second conversion chip U2 converts bus signals to the DVI digital video signal again, through behind the electro static filtering, the DVI digital video signal outputs to display device through DVI digital video signal interface CN2.
In embodiments of the present invention, first modular converter converts digital video signal to bus signals, a plurality of second modular converters convert the bus signals of first modular converter output to digital video signal respectively, export to a plurality of display devices respectively through a plurality of digital video signal output modules, like this, the vision signal frequency dividing circuit just can carry out frequency division to digital video signal, has satisfied client's demand.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a vision signal frequency dividing circuit is characterized in that, described vision signal frequency dividing circuit comprises:
The digital video signal input module that is connected with digital video signal source;
First modular converter, the output of the described digital video signal input module of its input termination is used for converting the digital video signal of described digital video signal input module output to bus signals;
A plurality of second modular converters, the output of described first modular converter of input termination of each described second modular converter is used for converting the bus signals of described first modular converter output to digital video signal; And
A plurality of digital video signal output modules, corresponding with described a plurality of second modular converters respectively, the output of input termination second modular converter of described digital video signal output module.
2. vision signal frequency dividing circuit as claimed in claim 1; it is characterized in that; the tie point of the described digital video signal input module and first modular converter also is connected to first and filters protection module, is used for the digital video signal of digital video signal input module output is carried out electro static filtering.
3. vision signal frequency dividing circuit as claimed in claim 1; it is characterized in that; the tie point of described each second modular converter and digital video signal output module also is connected to second and filters protection module, is used for the digital video signal of second modular converter output is carried out electro static filtering.
4. vision signal frequency dividing circuit as claimed in claim 1, it is characterized in that, described digital video signal source is the DVI digital video signal source, described digital video signal input module adopts the DVI digital video signal interface, and the VT of described DVI digital video signal interface is as the output of described digital video signal input module.
5. vision signal frequency dividing circuit as claimed in claim 4, it is characterized in that, described first modular converter adopts first conversion chip, the video signal input terminal of described first conversion chip is as the input of described first modular converter, and the bus signals output of described first conversion chip is as the output of described first modular converter.
6. vision signal frequency dividing circuit as claimed in claim 4, it is characterized in that, described second modular converter adopts second conversion chip, the bus signals input of described second conversion chip is as the input of described second modular converter, and the VT of described second conversion chip is as the output of described second modular converter.
7. vision signal frequency dividing circuit as claimed in claim 4, it is characterized in that, described digital video signal output module adopts the DVI digital video signal interface, and the video signal input terminal of described DVI digital video signal interface is as the input of described digital video signal output module.
8. vision signal frequency dividing circuit as claimed in claim 5 is characterized in that, the model of described first conversion chip is SII161.
9. vision signal frequency dividing circuit as claimed in claim 6 is characterized in that, the model of described second conversion chip is SSI164.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010182400.0A CN102263551B (en) | 2010-05-25 | 2010-05-25 | Video signal frequency division circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010182400.0A CN102263551B (en) | 2010-05-25 | 2010-05-25 | Video signal frequency division circuit |
Publications (2)
| Publication Number | Publication Date |
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| CN102263551A true CN102263551A (en) | 2011-11-30 |
| CN102263551B CN102263551B (en) | 2014-01-29 |
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| CN201010182400.0A Expired - Fee Related CN102263551B (en) | 2010-05-25 | 2010-05-25 | Video signal frequency division circuit |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1578462A (en) * | 2003-07-11 | 2005-02-09 | 先锋株式会社 | System and method for transmitting video signals |
| CN101426120A (en) * | 2008-10-23 | 2009-05-06 | 宁波奥科电子技术有限公司 | Method for expanding HDMI and/or DVI interface by single Ethernet cable for long distance connection |
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2010
- 2010-05-25 CN CN201010182400.0A patent/CN102263551B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1578462A (en) * | 2003-07-11 | 2005-02-09 | 先锋株式会社 | System and method for transmitting video signals |
| CN101426120A (en) * | 2008-10-23 | 2009-05-06 | 宁波奥科电子技术有限公司 | Method for expanding HDMI and/or DVI interface by single Ethernet cable for long distance connection |
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| CN102263551B (en) | 2014-01-29 |
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Address after: 518057 computer building of the Great Wall, Nanshan District science and Technology Park, Shenzhen, Guangdong Patentee after: CHINA GREAT WALL TECHNOLOGY GROUP Co.,Ltd. Address before: 518057 computer building of the Great Wall, Nanshan District science and Technology Park, Shenzhen, Guangdong Patentee before: CHINA GREATWALL COMPUTER SHENZHEN Co.,Ltd. |
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Effective date of registration: 20170906 Address after: 412000 Tianyuan District of Zhuzhou City, Hunan province forest road No. 258 Tianyi building 7 floor 704 (room 001) Patentee after: HUNAN GREAT WALL COMPUTER SYSTEM CO.,LTD. Address before: 518057 computer building of the Great Wall, Nanshan District science and Technology Park, Shenzhen, Guangdong Patentee before: CHINA GREAT WALL TECHNOLOGY GROUP Co.,Ltd. |
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Granted publication date: 20140129 |